Field Test And Kinetic Response Analysis Of Fixed Pile Pier Structure Vibration In Floating Wharf

In recent years,as the important node of "The Belt and Road Initiative",port construction is an extremely significant foundation to support the opening-up policy of China.Port project is the necessary engineering facility for port construction.Since some seaports are often attacked by typhoons and storms,the environmental issues must be considered in an important position in process of the construction planning for port engineering facility;of which the floating wharf is characterized with simple structure,rapid construction speed,less investment and strong adaptability to change of water-level,but the floating pontoon is vulnerably affected by wind and waves with poor safety.Therefore,the analysis on the stress characteristics and dynamic response of the floating-dock structure system under action of waves is always the emphasis and difficulty in field of engineering.A series of relevant subject studies are carried out in this paper on the dynamic response of structure system of floating wharf in Mount Putuo under action of wave force.At first,the signal acquisition of field vibration test is conducted based on engineering problem.Secondly,the mathematical programming operation software Matlab is utilized to process and analyze the test signal data.Finally,the finite element software Abaqus is applied to conduct the two-dimensional straight-pile numerical simulation,the three-dimensional batter-pile numerical simulation and the dynamic response analysis on structure system.The following scientific hypotheses and conclusions are mainly verified: the vibration stress factors of the fixed pile-pier of floating wharf come from the coupling resonance of steel bridge's driving force and wave force;of which the driving force of steel bridge has main influence with large effect,and the wave force has minor influence with small effect;the amplitude of the whole structure is large in horizontal direction and small in vertical direction.The subject studies above indicate that the defects of floating-wharf structure system in design,construction,operation and maintenance stage result in strenuous sway in vertical direction;and the stability does not meet the expected design and utilization requirements.Especially in adverse weather conditions such as violent storms and waves,the floating pontoon under wave force is fierce to the percussive force of steel bridge.Therefore,a more effective design scheme for avoiding structural instability and local destruction at design stage should be equipped with high safety requirements.